L7987L

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61 V 2 A asynchronous step-down switching regulator with adjustable current limitation

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  • The L7987L device is a step-down monolithic switching regulator able to deliver up to 2 A DC. The output voltage adjustability ranges from 0.8 V to almost VIN. The embedded switchover feature on the VBIAS pin maximizes the efficiency at light load. The adjustable current limitation, designed to select the inductor RMS current accordingly with the nominal output current, and the high switching frequency capability make the size of the application compact. Pulse-by-pulse current sensing with digital frequency foldback implements an effective constant current protection over the different application conditions. The peak current foldback decreases the stress of the power components in heavy short-circuit condition. The PGOOD open collector output can also implement output voltage sequencing during the power-up phase. Multiple devices can be synchronized sharing the SYNCH pin to prevent beating noise in low noise applications like sensors with A/D conversion.

    Key Features

    • 2 A DC output current
    • 4.5 V to 61 V operating input voltage
    • RDS,ON = 300 mΩ typ.
    • Adjustable fSW (250 kHz - 1.5 MHz)
    • Low IQ-SHD (11 μA typ. from VIN)
    • Low IQ (1 mA typ. - VIN 24 V - VOUT 3.3 V)
    • Output voltage adjustable from 0.8 V to VIN
    • Synchronization
    • Adjustable soft-start time
    • Adjustable current limitation
    • Advanced bootstrap capacitor management for LDO operation
    • VBIAS improves efficiency at light load
    • PGOOD open collector output
    • Output voltage sequencing
    • Digital frequency foldback in short-circuit
    • Peak current foldback in short-circuit
    • Auto-recovery thermal shutdown

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Related Applications

Home, Building and City Automation

Lighting and Controls

Power Supplies and Converters

Smart Farming

Evaluation Tools

    • Part Number

      2 A step down DC - DC switching regulator (VIN = 4.5 V to 60 V) based on the L7987L

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS10340
      61 V, 2 A asynchronous step-down switching regulator with adjustable current limitation
      4.0
      1.53 MB
      PDF
      DS10340

      61 V, 2 A asynchronous step-down switching regulator with adjustable current limitation

    • Description Version Size Action
      TN1224
      Mounting instructions for SMD (surface mounting device) packages
      2.2
      1.06 MB
      PDF
      TN1224

      Mounting instructions for SMD (surface mounting device) packages

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      L7987L Pspice model 1.0
      89.79 KB
      ZIP

      L7987L Pspice model

Publications and Collaterals

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF

      Electric vehicle (EV) ecosystem

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L7987L
Active
HTSSOP16 Industrial Ecopack2
L7987LTR
Active
HTSSOP16 Industrial Ecopack2

L7987L

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7987LTR

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

Sample & Buy

Part Number
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Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L7987LTR Available at 6 distributors

Distributor availability ofL7987LTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2246 1 Order Now
COMPEL EUROPE 1745 1 Order Now
FUTURE WORLDWIDE 5000 2500 Order Now
Newark Element14 AMERICA 405 0 Order Now
MOUSER WORLDWIDE 3792 1 Order Now
Farnell Element14 EUROPE 2061 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

2246

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1745

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

5000

Min.Order

2500

Region

WORLDWIDE Order Now

Newark Element14

Stock

405

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

3792

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2061

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

Buy now
Active
EAR99 NEC Tape And Reel HTSSOP16 - - PHILIPPINES 1.0 / 1k
L7987L Available at 5 distributors

Distributor availability ofL7987L

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1140 1 Order Now
ARROW EUROPE 1268 0 Order Now
ARROW AMERICA 5155 1920 Order Now
MOUSER WORLDWIDE 1800 1 Order Now
Farnell Element14 EUROPE 583 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

1140

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

1268

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

5155

Min.Order

1920

Region

AMERICA Order Now

MOUSER

Stock

1800

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

583

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

Buy now
Active
EAR99 NEC Tube HTSSOP16 - - PHILIPPINES 1.0 / 1k

L7987LTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.0 / 1k

Distributor availability ofL7987LTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2246 1 Order Now
COMPEL EUROPE 1745 1 Order Now
FUTURE WORLDWIDE 5000 2500 Order Now
Newark Element14 AMERICA 405 0 Order Now
MOUSER WORLDWIDE 3792 1 Order Now
Farnell Element14 EUROPE 2061 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

2246

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1745

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

5000

Min.Order

2500

Region

WORLDWIDE Order Now

Newark Element14

Stock

405

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

3792

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2061

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

HTSSOP16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.0 / 1k

Country of Origin

PHILIPPINES

L7987L

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.0 / 1k

Distributor availability ofL7987L

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1140 1 Order Now
ARROW EUROPE 1268 0 Order Now
ARROW AMERICA 5155 1920 Order Now
MOUSER WORLDWIDE 1800 1 Order Now
Farnell Element14 EUROPE 583 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

1140

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

1268

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

5155

Min.Order

1920

Region

AMERICA Order Now

MOUSER

Stock

1800

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

583

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

ECCN (EU)

NEC

Packing Type

Tube

Package

HTSSOP16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.0 / 1k

Country of Origin

PHILIPPINES

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors